bifocals แปลว่า
- n. แว่นสองเลนส์
ประโยค
Gandhi's bifocals, FDR's iron lung.
He also invented the Franklin stove, bifocals and the flexible urinary catheter.
Progressive lenses are designed so that a smooth and seamless progression of lens power runs vertically down each lens, providing clear vision at all distances and a more natural depth focus than bifocals.
